Judd‐Ofelt Theory — The
            <i>Golden</i>
            (and the Only One) Theoretical Tool of f‐Electron Spectroscopy

Smentek, Lidia

doi:10.1002/9781118688304.ch10

Cited by 9 publications

(9 citation statements)

References 63 publications

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“…To better understand the effect of the chemical environment on luminescent properties of Eu 3+ ions in a pure host matrix, the standard J–O theory is helpful, especially for interpreting REE 3+ electronic spectra and estimating the transition probability of 4f electrons . In their conclusive formulation, the general expression becomes where S f ← i denotes intensity and Ω λ (λ = 2, 4, 6) are the J–O parameters.…”

Section: Resultsmentioning

confidence: 99%

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Spectroscopic Studies of Mössbauer, Infrared, and Laser-Induced Luminescence for Classifying Rare-Earth Minerals Enriched in Iron-Rich Deposits

et al. 2020

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Rare-earth (RE) phosphates often appear as an accessory phase in igneous or metamorphic rocks; however, these rocks are composed of myriad chemical elements and nuclides that interfere with the qualitative or quantitative analyses of the RE phosphates over a range of concentrations in the absence of a pretreatment. In addition, the limit of each analytical methodology constrains the approach as well as the usefulness of the results in geoscience applications. Here, we report the specific mineral characterization of RE-containing ores from Yen Phu mine, Vietnam, using a range of state-of-the-art spectroscopic techniques in conjunction with microscopy: Mössbauer spectroscopy, infrared microspectroscopy, time-resolved laser-induced fluorescence spectroscopy (TRLFS), and scanning electron microscopy with energy-dispersive X-ray spectroscopy. Because the distribution of each element in the deposit differs, such combinatorial works are necessary and could lead to more plausible answers to questions surrounding the point of origin of RE elements. The results of our Mössbauer spectroscopic analysis indicate that the three ores sampled at different locations all contain magnetite-like, hematite-like, and iron(III) salts other than hematite. In addition, we confirmed the presence of phosphate around the grain boundary in the magnetite-like mineral phase by infrared microspectroscopic analysis. The present analytical findings of trace amounts of europium(III) using TRLFS suggest that the europium ions generate identical luminescence spectra despite being embedded in three different matrices of iron minerals. This demonstration highlights the benefits of combinatorial spectroscopic analyses to gain insights into the effects of the environment of REs on their solid-state chemistry and shows the potential utility of TRLFS as a resource mining tool. Further applications of this approach in the analytical screening of rocks and minerals are feasible.

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Section: Resultsmentioning

confidence: 99%

“…For the details of the mathematical derivation and the corresponding interpretation in the J−O theory, readers are referred to recent tutorials and brilliant reviews. 21,24,49 Therefore, conclusive remarks based on these reviews are briefly summarized in the followings paragraphs.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

Spectroscopic Studies of Mössbauer, Infrared, and Laser-Induced Luminescence for Classifying Rare-Earth Minerals Enriched in Iron-Rich Deposits

et al. 2020

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“…In the intermediate coupling scheme, the free-ion Hamiltonian can be written as H = H e + H so . [15] The electrostatic (e) interaction Hamiltonian can be reduced to the electron-electron repulsion form, [16] which can be split into its radial (F k ; Slater integrals) and angular (f k ) parts:…”

Section: Methodsmentioning

confidence: 99%

Modeling the Performance of Dy³⁺‐Based Boltzmann Thermometers by the Judd–Ofelt Theory

Martinović

Dramićanin

Ćirić

2022

Advcd Theory and Sims

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Energy level positions, refractive index values, Judd-Ofelt (JO) intensity parameters, Slater integrals, and spin-orbit coupling parameters are taken from the literature for 27 Dy 3+ -doped materials (five crystals and 22 glasses). Investigated are only the transitions that are used for the Boltzmann-type luminescence intensity ratio (LIR) thermometers (transitions from the three thermalized levels, 4 F 9/2 , 4 I 15/2 , and 4 G 11/2 to the ground level). Reduced matrix elements of these three transitions are calculated from the Slater integrals and spin-orbit coupling parameters and they are compared to the most frequently used values from Carnall's tables. The comparison of JO parameters shows the smaller variation of the 𝛀 6 , related to rigidity, in crystal hosts than in glasses, and the opposite was observed for the 𝛀 2,4 parameters. LIR performances are simulated by the JO thermometric model for each material by the conventional LIR and the LIR that exploits the third thermalized level. The comparison of the predicted figures of merit in luminescence thermometry reveals the most promising thermometric Dy 3+ doped crystals and glasses.

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“…The ongoing research studies in this field can be classified into three categories: (i) theory improvement and development of alternate JO parametrisation methods 5,[10][11][12][13][14][15][16][17] , (ii) JO parametrisation of lanthanides in different hosts doped at various concentrations and analysis of lanthanide-activated phosphors synthesised by different…”

Section: Selfmentioning

confidence: 99%

Self-referenced method for the Judd–Ofelt parametrisation of the Eu3+ excitation spectrum

Ćirić

Marciniak

Dramićanin

2022

Sci Rep

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Judd–Ofelt theory is a cornerstone of lanthanides’ spectroscopy given that it describes 4fn emissions and absorptions of lanthanide ions using only three intensity parameters. A self-referenced technique for computing Judd–Ofelt intensity parameters from the excitation spectra of Eu3+-activated luminescent materials is presented in this study along with an explanation of the parametrisation procedure and free user-friendly web application. It uses the integrated intensities of the 7F0 → 5D2, 7F0 → 5D4, and 7F0 → 5L6 transitions in the excitation spectrum for estimation and the integrated intensity of the 7F0 → 5D1 magnetic dipole transition for calibration. This approach facilitates an effortless derivation of the Ω6 intensity parameter, which is challenging to compute precisely by Krupke’s parametrisation of the emission spectrum and, therefore, often omitted in published research papers. Compared to the parametrisation of absorption spectra, the described method is more accurate, can be applied to any material form, and requires a single excitation spectrum.

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Judd‐Ofelt Theory — The Golden (and the Only One) Theoretical Tool of f‐Electron Spectroscopy

Cited by 9 publications

References 63 publications

Spectroscopic Studies of Mössbauer, Infrared, and Laser-Induced Luminescence for Classifying Rare-Earth Minerals Enriched in Iron-Rich Deposits

Spectroscopic Studies of Mössbauer, Infrared, and Laser-Induced Luminescence for Classifying Rare-Earth Minerals Enriched in Iron-Rich Deposits

Modeling the Performance of Dy³⁺‐Based Boltzmann Thermometers by the Judd–Ofelt Theory

Self-referenced method for the Judd–Ofelt parametrisation of the Eu3+ excitation spectrum

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Judd‐Ofelt Theory — The Golden (and the Only One) Theoretical Tool of f‐Electron Spectroscopy

Cited by 9 publications

References 63 publications

Spectroscopic Studies of Mössbauer, Infrared, and Laser-Induced Luminescence for Classifying Rare-Earth Minerals Enriched in Iron-Rich Deposits

Spectroscopic Studies of Mössbauer, Infrared, and Laser-Induced Luminescence for Classifying Rare-Earth Minerals Enriched in Iron-Rich Deposits

Modeling the Performance of Dy3+‐Based Boltzmann Thermometers by the Judd–Ofelt Theory

Self-referenced method for the Judd–Ofelt parametrisation of the Eu3+ excitation spectrum

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Product

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Modeling the Performance of Dy³⁺‐Based Boltzmann Thermometers by the Judd–Ofelt Theory